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.:.. u~riiriirtuiur~i TWIN PINES INVESTMENT LIMITED PARTNERSHIP sss FALCON ENERGY, INC. GENERAL PARTNER TWIN PINES COAL MINE tt2 (719) 784369 P. O. BOX 187 1805 COUNTY ROAD p86 ROCKVALE, COLORADO 81244 March 30, 1992 nP~ ~ 1 X992 `dined wand Mrs. Cathy Begej , Lead Specialist Reclamation ~°"`"^^ Mined Land Reclamation Division Room 215, Centennial Building 1313 Sherman Street Denver, Colorado 80203 Subject: Twin Pines No. 2 Mine. Permit No. C-058-83 Dear Mrs. Begej: In accordance with Stipulation Nos. 1 and 2, as revised by Technical Revision No. 1, to subject permit the "Water Monitoring Report" for the period 7/91 to 12/91 is submitted herewith. During the period development was discontinued on the three new en- tries to the South due to the continued split in the coal seam. Three entries are now being driven to the Northwest, parallel to^the origin- ~ al`Main En3:ries.INo significant water has been encountered in the ' i.3evelopment:-During the period water was pumped daily from behind the seals of the Second East Section. Discharge from the mine is being monitored in accordance with the requirements of Stipulation Nos. 1 an 2 and the NPDES permit. Copies of discharge logs, sample logs, NPDES reports, and Mine Maps are en- closed. Water level measurements and associated data for the water monitoring wells for t_he reporting period are as follows: TPW-1 ~;ALDIROLA DIO. 2 DATE: 5/17/91 10/15/91 12/25/91 5;17/91 10/15/91 1^/25!91 ------------- CONDUCTIVIT'f ------- 940 ----------- 840 ------ 790 - 720 720 --- PH 8.5 8.5 8.5 7.5 7.5 --- LEVEL 146.4 144.0 145.0 91.9 90.7 ---- TEMPERATiJRE 55 F 53 F 51 F 52 F 53 F ---- There again appears *_o be no significant impact on the wells from p~unping Er,-,m the min- . Samples for *h~ w.3T5r q~:•alitq .,n.1~~si~ •_•r ~~elt_ no. TPW-1 were taken In Decemt~~=. _:i~ --_.---- of .~_ ~na~_'s_~ ~_ anclose~i.